Dr. Ben King, from CMS at Plymouth University, recently visited Dr. Victor Dinu, a researcher at the University of Bucharest. His visit lasted one week. They collaborated on theoretical calculations of laser-particle physics. Ben adapted Victor’s code to work on the computer cluster at Plymouth University. Using forty cores, they were able to obtain a speed-up of about a factor 10. This was just a test run with a real part of the calculation, but it was a success, since the proof of principle of parallelizing the code was demonstrated.